Compatibility and Differences Between Various SMPL-X Models and Blender Add-ons

[sunday9999]

I have noticed there are many SMPL-X models:

SMPL-X v1.1
SMPL-X with removed head bun
SMPL-X 2020: The neutral SMPL-X model with the FLAME 2020 expression blendshapes

Can the poses and hand poses of these models be used interchangeably?
For example, if I use poses and hand poses generated by the SMPL-X model to replace those in an action sequence generated by the SMPL-X 2020 model (keeping other fields like betas and expressions unchanged), will the resulting animation be displayed correctly using Blender's plugin?

Additionally, I have found there are two different versions of the SMPL-X Blender Add-on:

SMPL-X Blender Add-on (10 shape components)
SMPL-X Blender Add-on (300 shape components)

What are the differences between these two versions?

Thank you for your assistance.